@mixin boxs($width: 100%, $heigth: false, $borr: false) {
  width: $width;
  @if $heigth {
    height: $heigth;
  }
  @if $borr {
    border-radius: $borr + px;
  }
}
@mixin fz($fz, $color, $lineh: false, $tc: false) {
  font-size: $fz + px;
  color: $color;
  @if $lineh {
    line-height: $lineh + px;
  }
  @if $tc {
    text-align: center;
  }
}
